Device for removing drills or other articles from their shafts



Feb. 25, 193 6. R. A. BEDFORD 2,031,814

DEVICE FOR REMOVING DRILLS OR OTHER ARTICLES FROM THEIR SHAFTS Filed Sept. 19, 1935 J m um REGINALD ASLINE' BEDFORD, 37

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Patented Feb. 25, 1936 UNITE STATES PATENT OFFICE DEVICE FOR REMOVING DRILLS OR OTHER ARTICLES FROM THEIR SHAFTS Reginald Asline Bedford, Stumperlowe, Sheflield, England 6 Claims. (Cl. 29-861) This inventionrelates to a device for separating joined components capable of being forced apart axialwise one from the other and is particularly applicable for forcibly removing detachable bits from their drill shafts upon which they have become fast during working operations.

The object of the invention is to provide an improved device of small and compact construction, simple and yet effective and speedy in operation and one that is inexpensive to manufacture.

A device for separating joined components capable of being forced apart comprises a bed or frame for accommodating the joined components, gripping means provided on said bed or frame and operable upon one of said components, a slidable impact member positionable and operable against the other of said members and an anvil member mounted about a pivot on the bed or frame adjacent to the impact member and adapted, on being struck by a hammer, to contact with and transmit impacts to the slidable impact member and cause the latter to impinge against the said other member so as to force it apart axially from the one member.

The gripping means comprises a pair of jaws one of which is fixed and the other movable by an anvil member pivotally mounted adjacent theretoand adapted, on being struck, to traverse the movable jaw towards the fixed jaw. The movable jaw may be spring pressed so that it is traversed by the anvil member against the action of the spring and retracted by reaction of the spring when the anvil member is released from operative contact with the movable jaw.

Referring to the drawing filed herewith:-

Fig. 1 is an elevation of one form of device made according to this invention and adapted for removing a taper socketed drill bit from a taper spigoted drill shaft;

Fig, 2 is an end elevation; and.

Fig. 3 is also an end elevation but taken from the opposite end;

Fig. 4 is a plan.

a is a base block and b, c are a pair of jaws provided longitudinally in the upper face of said block near one end thereof, the jaw 22 being fixedly mounted and the jaw 0 being movably mounted about a pivot c and spring pressed by the spring d so as to be movable towards and away from the fixed jaw b. Mounted alongside the movable jaw 0 upon a pivot e in housings e of the block is a jaw actuating anvil member f, said member being eccentrically pivoted so that on being operated upon to move it about its pivot a curved face g thereof bears against the adjacent movable jaw c with a cam-like action so that on continued movement of the anvil member f about its pivot e it bears increasingly against the movable jaw c in order to traverse the said jaw towards the fixed jaw b and grip a drill shaft h placed in the jaws longitudinally of the block a. The other end of the block is provided with a seating 7' for assisting to support the drill shaft 71. when placed in the jaws. k and m are two lugs with which a slidable impact member 11. is associated and located transversely of the block, said impact member n being slung at one end about a pivot 0 carried by the lug m on which it can slide and be swung into or out of position across the lugs k and m.

Mounted between the lugs k and m eccentrically on co -axial pivots 10 therein is an anvil member q and this anvil member is provided with a curved face r adapted on being moved downwardly about its pivots to bear against the impact member n with a cam-like action similar to that of the anvil member 1 which bears against the movable jaw 0 so that on continued downward movement the anvil member bears increasingly against the impact member n to cause it to slide upon its pivot, a stop 8, constituted by an extension to the lug 7c, being provided for limiting such movement of the impact member n. The anvil member q bearing against the impact member is forked or bifurcated at its pivoted end to admit the passage of the drill shaft h and bit t longitudinally of the block when placed in the jaws b, c and resting on the seating 7'.

The fixed and movable jaws b, c and the seating 9' for the drill shaft may be detachably accommodated in the block a so as to be capable of renewal.

In use, for removing the detachable bit t which during working operations becomes tightly wedged upon the shaft h, the said drill shaft h with its attached bit t is passed longitudinally into position with the shaft portion resting in the jaws b, c and its end adjacent the bit resting on the seating :1 between the lugs k, m, as seen in Fig. 4, the drill shaft being so positioned that the outer extremity of the bit socket which forms a shoulder around the drill shaft is located in a position close to that side of the impact member 11. remote from the adjacent anvil member q and when the impact member is in its most rearward position. The two anvil members 1 and q are normally in the raised position before the drill shaft is placed in position and the jaw actuating anvil member I is then struck downwards by a hammer so as to close the movable jaw c and cause it to grip the drill shaft h. The other anvil member q is also then struck downwards by a hammer and thereby acts upon the slidable impact member n, each impact on the anvil member being transmitted to the impact member which is caused to slide forwards and since it is hearing against the shoulder of the drill bit t and the shaft h is gripped in the jaws b, c, said bit is removed from the shaft by the sliding movement of V the impact member after a few blows.

As the anvil members i and q are struck downwards their curved faces engage their respective members upon which they bear and being eccentrically pivoted their engagement is increased with each blow and in this way they exert considerable pressure sufficient in the one case to grip the drill shaft, and in the other case sufficient to forcibly remove the bit from theshaft.

What I claim and desire to secure by Letters Patent is:- v

1. A device for separating joined components capable of being forced apart comprising a base block for accommodating the joined components, gripping means provided on said base block and operable upon one of said components, a slidable impact member positionable and operable against the other of said members and an anvil member mounted about a pivot on the base block adjacent to the impact member and adapted, on being struck by a hammer, to contact with and transmit impacts to the slidable impact member and cause the latter to impinge against the said other member so as to force it apart axially from the: one member.

2. A device for separating joined components capable of being forced apart comprising a base block for accommodating the joined components, cd-operating'fixed and movable jaws on said base block and operable upon one of said components, a pivoted anvil member mounted on the baseblock adapted for actuating the movable jaw, a slidable impact member positionable and operable against the other of said members and an anvil member mounted about a pivot on the base block adjacent to the impact member and adapted, on being struck by a hammer, .to contact with and transmit impacts to the slidable impact member and cause the latter to impinge against the said other member so as to force it apart axially from the one member.

3. A device for separating joined components capable of being forced apart, as claimed in claim 2, wherein the movable jaw is actuated by the anvil member against the action of a spring.

4. A device for separating joined components capable of being forced apart comprising a base block for accommodating the joined components, co-operating fixed and movable jaws on said base block and operable upon one of said components, a pivoted anvil member mounted on the base block adapted for actuating the movable jaw, a slidable impact member positionable and operable against the other of said members and an anvil member mounted about a pivot on the base block adjacent to the impact member and adapted, on being struck by a hammer, to contact with and transmit impacts to the slidable impact member and cause the latter to impinge against the said other member so as to force it apart axially from the one member, and means on the base block for limiting slidable movement of the impact member on actuation thereof by the anvil member adjacent thereto.

5. A device for separating joined components capable of being forced apart comprising a block, co-operating fixed and movable jaws mounted longitudinally at one end of said block, an eccentrically pivoted anvil member mounted in housings on the block for operating the jaws, a bifurcated anvil member eccentrically pivoted by its bifurcated limbs to lugs on the block and operable against an impact member located at the other end of the block, said impact member being mounted at one end about, and slidable over, a pivot carried by one of said lugs and being adapted so as to be positionable against the component which is to be removed from the other.

6. A device for separating joined components capable of being forced apart comprising a block,

co-operating fixed and movable jaws mounted longitudinally at one end of said block, an eccen-- trically pivoted anvil member mounted in ho'usings on the block for operating the jaws, a bifurcated anvil member eccentrically pivoted by its bifurcated limbs to lugs on the block and operable against an impact member located at the other end of the block, said impact member being mounted at one end about, and slidable over, a pivot carried by one of said lugs and being adapted so as to be positionable against the component which is to be removed from the other, means being provided for limiting slidable movement of the impact member.

REGINALD ASLINE BEDFORD. 

